Probing selected morphological models of hydrated Nafion using large-scale molecular dynamics simulations.

Atomistic molecular dynamics simulations were performed to study hydrated Nafion systems large enough (approximately 2 million atoms, approximately 30 nm box length) to directly observe several hydrophilic domains at the molecular level. These systems consisted of six of the most significant and relevant morphological models of Nafion to-date: (1) the cluster-channel model, (2) the parallel cylinder model, (3) the local order model, (4) the lamellar model, (5) the rod network model, and (6) a "random" model that does not directly assume any particular geometry, distribution, or morphology. Each system was initially built to closely approximate the proposed hydrophilic cluster structure in a given model.

Synthesis and characterization of photoluminescent In-doped CdSe nanoparticles.

Indium-doped CdSe nanoparticles have been synthesized and characterized. Their light absorption, photoluminescence, and structure are similar to undoped CdSe nanoparticles. The greater part of the In associated with the nanoparticles is removed when the nanoparticles undergo ligand exchange by pyridine.